Booster for loose-leaf ring books



Jan. 6, 1931. J. SCHADE 1,787,956

BOOSTER FOR LOOSE LEAF RING BOOKS Filed Nov. 29, 1929 [77 Ue??? forfo/171 @c ad@ 5y y Patented Jan. f6, 1931 y UNL'IEQD STAT-ES JOHNSCHADE,OF HOLYOKE'MASSAGHUSETTS, .ASSIGNORV TO NATIONAL BLANK BOOKCOIVIPANY, OE HOLYOKE,MASSA.CHUSETTKS, A COREOEATION,OF'MASSACHUSETTSBoosirER FOR LOOSE-LEAF RING Booxs Appiicanon sied November 29, i929.seriai'iro. 410,391.

This invention relates to loose 'leatbooks of the kind known as ringbinders in which curved prong members/are carried by flatv metal stripshingedly connected at their centersandconned along theirouter edges`within .a resilient plate, so that the prongs are yopened and closedwith a spring action.

But the present invention specifically. has reference to what are kno-wnas boosters that are manipulated to open the prongs and that are locatedat the ends of the binder, the object of the invention being to so pivotthe booster directly to the ends ot the prongcarrying leaves, that theycannot become 'accidentally disassembled, arev `positive in theiroperation, and add little to the cost of the binder. y

In the accompanying drawings Y i Figure l is a broken top view of abindei' equipped with the improved booster.

Figure 2 is a bottom view of suchbinder. Figures 3 and 4 are sections atline 3-3 of Figure 2, and showing respectively the positions otpai'tsbefore and after the booster has been operated.

Figure 5 is an end view of the structure shown at Figure l with theprongs omitted, and

Figure Gis ajdetail perspective of the.

booster.

Similar numerals of reference denote' like parts in the several figuresof the drawing. i

l is the cover plate of the binder made of spring-metaland having itsside edges bent inwardly to Jform pockets 2 within which the hingedprong-carryingleaves 3 are housed in the usual manner, and 4 are theprong members.

The leaves 3 are extended from'the ends of fthe binder and their outerlateral extremities have inwardly projecting hooks 5 which proy videnotches 6 for the purpose presently to be explained.

The booster" comprises an upstanding 'liunib or linger piece 7 and alower inwardly extending triangular part 8 which is the actual boostermember, and the lateral edges of the booster intermediate the parts 7land v8 are notched as shown atf9, and prior to the assembly of theleaves l3 within the pockets 2,

the notches 6 and '9 are interengaged so'as to provide a pivotalrelation between thebooster Land the leaves, and after suchassembly the'vpart 8 will extcndbeneath the leaves with the apex of said partimmediately below the *Y leaves at their line of hinging as clearlyshown at `Figure 3.

When the part 7 is forced outwardly the partA 8 will be thrown upwardlyagainst the leaves and will cause them tospring into the yposition shownat Figure 4 and this will open the prongs 4. s

There is nothing new inthe construction ofr lthe ring binder shown, noris it new to provide -boosters which operate in the manner abovedescribed, but' the invention resides solely in the mannervof hiiigingthe booster.

I/Vhat is claimed is": i

l. In a loose leaf ring binder comprising a v`resilient c plate,vprong-carrying hinged extensions beyond the-ends of said plate, in-

wardly projecting hooks formed on said eX-.

tensions, and abooster having an upstandiiig part and an inwardlyextending bottom part and provided with notches at the sidesintermediate said parts, said notches being interengaged withV saidhooks.

2; Ina loose leaf ring binder comprising a resilient plate, hingedprong-carrying leaves confined within said plate and having notchedextensions beyond the ends of said y notches in the inner side edges ofthe leaves `leaves' confined within said plate and having adjacent theends thereof, whereby the booster is held in pivotal relation to saidleaves.

-In testimonywhereof I aliix my signature hereto. y

' l JOHN SCHADE.

